package com.h824;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;

public class ArrayList_Demo {


    public static void main(String[] args) {
        /*ArrayList list = new ArrayList();
        for (int i = 0; i < 50; i++) {
            list.add(i);

        }*/
        Set set = new HashSet();
        for (int i = 0; i < 50; i++) {
            set.add(i);

        }

        System.out.println();
    }


}
